I couldn't have been that composed. I envy your handling of this horrible situation.
This reminds me of when I showed my Civil War Quilt at our Guild. A young girl rattled off all of the things that were wrong with it, and what she would have done that would have made it so much better. This was all of the time the quilts were shown around the room. She ruined my showing my quilt.
I was totally mortified. After I cooled off, I wrote her an email, and reminded her that our guild says in writing that we are not to comment except postively about someone's work.
How many quilts has she made? None. I know she has been in guild at least 5 yrs.
Some people have to leave their brains at home when seeing other's work.
Mariah.